plotting Phase-Plane Portraits

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Tina
Tina on 28 Jan 2013
Commented: tsen chung jui on 24 Mar 2022
Hi everyone!
How can I plot phase-plane portraits of a nonlinear system?
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JEAN-CLAUDE boleme
JEAN-CLAUDE boleme on 11 Apr 2021
I NEED HELP WITH QUESTION 3 AND QUESTION 4 REGARDING MATLAB CODES

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Answers (3)

Shashank Prasanna
Shashank Prasanna on 28 Jan 2013
MATLAB offers several plotting routines. The "quiver" function may be ideal to plot phase-plane portraits. I found an interesting link that has some code and discussion on this topic. You can start here and build up:

Brian Hong
Brian Hong on 26 Jan 2022
Edited: Brian Hong on 26 Jan 2022
There are also app solutions for this problem. For example pplane, which I used in undergrad (almost 10 years ago now). We also created a new app for analyzing the phase plane, you can find it here.

Dan Girma
Dan Girma on 21 Oct 2015
xdot = -y, ydot = -x sketch the vector field.

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